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Finding the Fourth Proportional to 13,435.46, 18,539.46 and 7,769.35

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Solution

The fourth proportional to 13,435.46, 18,539.46 and 7,769.35 is: 10,720.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,435.46 : 18,539.46 = 7,769.35 : x
  2. Step 2: Convert to fraction form
    13,435.46/18,539.46 = 7,769.35/x
  3. Step 3: Cross multiply
    13,435.46x = 18,539.46 × 7,769.35
  4. Step 4: Simplify right side
    13,435.46x = 144,039,576.73
  5. Step 5: Solve for x
    x = 144,039,576.73/13,435.46
  6. Step 6: Final answer
    x = 10,720.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.